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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package math
/*
* floating-point mod func without infinity or NaN checking
*/
// Fmod returns the floating-point remainder of x/y.
func Fmod(x, y float64) float64 {
if y == 0 {
return x;
}
if y < 0 {
y = -y;
}
yfr, yexp := Frexp(y);
sign := false;
r := x;
if x < 0 {
r = -x;
sign = true;
}
for r >= y {
rfr, rexp := Frexp(r);
if rfr < yfr {
rexp = rexp-1;
}
r = r - Ldexp(y, rexp-yexp);
}
if sign {
r = -r;
}
return r;
}
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